CSC, SURF and Nokia Achieve 1.2 Tbit/s Data Transfer to prepare long haul network for new LUMI-AI supercomputer and AI Factories
Press ReleaseCSC, SURF and Nokia Achieve 1.2 Tbit/s Data Transfer to prepare long haul network for new LUMI-AI supercomputer and AI Factories
Trial helps researchers prepare network for high performance computing (HPC) clusters and AI Factories handling massive datasets and high-intensity workloads.
Results confirm that multi-domain, high-capacity data transfers across European research networks are both feasible and future-ready.
4 June 2025Espoo, Finland – Nokia, CSC – IT Center for Science and SURF have successfully tested a high-capacity, quantum-safe fibre-optic connection exceeding 1.2 terabit per second (Tbit/s) between Amsterdam, the Netherlands and Kajaani, Finland with data traversing over 3500 kilometers. The trial, which was conducted in May 2025, demonstrated the potential of ultra-fast, cross-border connectivity for research.
Tests were carried out along several routes, including the longest which spanned 4,700 km through Norway at a capacity of 1Tbit/s. To put this in perspective, 1 Tbit/s is enough to stream 200,000 full HD movies (at 5 Mbit/s each) simultaneously.
These results are particularly promising as the research community prepares for supercomputers and AI Factories to come online – where reliable, scalable, and secure connections will be critical to supporting some of the world's largest datasets and most demanding workloads.
The test used a combination of real research data and synthetic data, transferred directly from disk to disk – from SURF's facility in Amsterdam to CSC's data center in Kajaani, across five production research and education networks: SURF (the Netherlands), NORDUnet (Nordic backbone), Sunet (Sweden), SIKT (Norway) and Funet (CSC's network in Finland).
The network solution was based on Nokia's IP/MPLS routing and quantum-safe optical networking gear. Nokia's IP technology successfully demonstrated Flexible Ethernet (FlexE) to accommodate 'elephant flows', or very large continuous flows of data, and its high-capacity optical transport technology showed the ability to handle massive data sets generated by HPCs over long distances.
With the exponential growth of research data, especially for training large-scale AI models, the need for resilient, high-throughput and secure connectivity is more critical than ever. This test confirms that multi-domain, high-capacity data transfers across European research networks are both feasible and future-ready. Testing an operational network connection over long distances provides unique insights into data transport and storage of large data volumes. The tests are crucial for improving the infrastructure for data-intensive research.
'We design research networks with future needs in mind. CSC's data center in Kajaani already hosts the pan-European LUMI supercomputer and with the upcoming LUMI-AI supercomputer and AI Factory coming online, reliable and scalable data connections throughout Europe are essential. Even though the geographical distance is significant, it poses no obstacle to data traffic,' said Jani Myyry, Senior Network Specialist, CSC.
'As SURF we are ready to take the next step in aligning the European supercomputers. These efforts offer future perspectives to train GPT-nl on LUMI or for a researcher to compute on LUMI with very large datasets hosted at SURF, such as the KNMI (The Royal Netherlands Meteorological Institute) datasets. We are very grateful to our Nordic partners for their help setting up this trial connection. This is again an example of the continued good cooperation between NRENs to create the best possible international infrastructure for research and education,' said Arno Bakker, Senior Network Specialist, SURF.
'Groundbreaking trials like this highlight how advanced networks are foundational to unlocking the full potential of AI and high-performance computing. This successful collaboration with CSC and SURF is a testament to the innovation and leadership of the scientific community, and to what's possible when we work together. As the network prepares for the next wave of supercomputers and AI Factories, we are proud to deliver the quantum-safe, high-capacity, and resilient IP/MPLS and optical infrastructure that makes these systems viable. We look forward to continuing our support for global research and education networks, helping them scale with confidence and drive the next generation of discovery and innovation,' said Mikhail Lenko, Customer Solutions Architect, Nokia.
Resources and additional informationProduct Page: 7750 Service RouterProduct Page: 1830 Photonic Service Switch (PSS)Product Page: 1830 Photonic Service Interconnect – Modular (PSI-M)Web Page: Quantum-safe networks
About NokiaAt Nokia, we create technology that helps the world act together.
As a B2B technology innovation leader, we are pioneering networks that sense, think and act by leveraging our work across mobile, fixed and cloud networks. In addition, we create value with intellectual property and long-term research, led by the award-winning Nokia Bell Labs, which is celebrating 100 years of innovation.
With truly open architectures that seamlessly integrate into any ecosystem, our high-performance networks create new opportunities for monetization and scale. Service providers, enterprises and partners worldwide trust Nokia to deliver secure, reliable and sustainable networks today – and work with us to create the digital services and applications of the future.
About CSC – IT Center for ScienceCSC is a Finnish center of expertise in ICT that provides world-class services for research, education, culture, public administration and enterprises, to help them thrive and benefit society at large. csc.fi
About SURF SURF is the ICT cooperative of Dutch education and research institutions. The members, the owners of SURF, join forces to develop or procure the best possible digital services, work together on complex innovation issues and develop and share knowledge with each other. SURF actively collaborates with other European NRENs united in GÉANT and participates in global consortia like the Advanced North Atlantic (ANA) and Asia Pacific Europe Ring (AER). NetherLight, SURF's Global Exchange Point (GXP) dedicated to research and education data in Amsterdam connects similar GXPs and advanced high-capacity networks for scientific and educational collaboration. The NetherLight GXP plays a major and vital role in the federation of research and education networks worldwide, also known as the Global Research and Education Network (GREN). www.surf.nl
Media inquiriesNokia Press OfficeEmail: Press.Services@nokia.com
Nokia Media RelationsSarah MillerPhone: +1 613-720-9716Email: sarah.miller@nokia.com
CSC Media RelationsSanna KostiainenPhone: +358 40 0712072Email: viestinta@csc.fi
SURF SpokespersonTom HovenPhone: +31 641 439 398Email: tom.hoven@surf.nl
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